Where does “-és” come from?
-és (Galician) comes from Old Portuguese -és, from Latin -ensis, from Latin arvum, from Latin colō, from Latin quelō, from Proto-Italic kʷelō, from Proto-Indo-European kʷéleti, from Proto-Indo-European kʷel- — to turn.
-és (Galician): -ese
Ancestry of “-és”, step by step